CN115502407A - Metal powder forming and post-processing system - Google Patents
Metal powder forming and post-processing system Download PDFInfo
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- CN115502407A CN115502407A CN202211469763.1A CN202211469763A CN115502407A CN 115502407 A CN115502407 A CN 115502407A CN 202211469763 A CN202211469763 A CN 202211469763A CN 115502407 A CN115502407 A CN 115502407A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/14—Treatment of metallic powder
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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Abstract
The invention relates to a metal powder forming and post-treatment system, which comprises a preheating device, a smelting furnace, an air injection device, a powder making barrel and a collecting barrel. The heating device comprises a feeding channel. The smelting furnace include the open furnace body of arranging in upper end, preheating device covers establishes at furnace body upper end opening part, the furnace body outside is equipped with second heating device, furnace body below through connection has the liquid outlet. The air injection device is sleeved outside the furnace body, and the inclined air flue outlet of the air injection device is flush with the outlet of the liquid outlet. The inclined air passage outlet and the liquid outlet are inserted into the powder making barrel. The collecting barrel is connected below the powder making barrel in a penetrating mode, the top surface, located on the outer side of the powder making barrel, of the collecting barrel is connected with an exhaust pipe in a penetrating mode, and a filter screen is arranged at the penetrating connection position of the exhaust pipe and the collecting barrel. A funnel bin is arranged below the inner part of the material collecting barrel, and a butterfly valve is arranged at the bottom opening of the funnel bin. The metal wire is used as a raw material, the occupied space of the equipment is small, and the utilization rate of a workshop is high.
Description
Technical Field
The invention belongs to metal processing equipment, and particularly relates to a metal powder forming and post-processing system.
Background
Metal powder is used as a raw material in many fields, and the preparation of metal powder mostly adopts a method of pulverizing molten metal into particles with the size of less than 150 mu m by an atomization method. The atomization method can be divided into four types according to different atomization media and atomization principles, namely a water atomization method, an air atomization method, a plasma atomization method and an ultrasonic atomization method, wherein the air atomization method accounts for about 80 percent of the prior art.
The process of the aerosol method is a process that metal liquid drops are thinned and generate laminar fiberization through the action of gas shearing and extrusion in the free falling process. When the liquid drops leave the effective atomization zone, the external pressure of the liquid drops is greatly reduced, and self-excitation crushing is caused by imbalance of the internal pressure and the external pressure of the liquid drops.
Therefore, the metal is melted in the previous process of preparing the metal powder by adopting the aerosol method, in the prior art, a whole metal ingot is mostly melted in a crucible, then the solution is transferred to an atomizing nozzle of the aerosol method, the solution is mixed with high-pressure air flow, the high-pressure air flow forms metal solution particles through shearing and extrusion, and the solid metal powder is obtained after the solution particles are cooled.
Because the metal outer surface has an oxide layer which is made of metals such as aluminum alloy and magnesium alloy, and meanwhile, in the smelting process of the metal, redundant raw materials such as flame retardant and the like are added, so that the metal solution contains impurities, the practical solution is directly atomized, and the purity of the produced metal powder is insufficient. Meanwhile, the crucible for smelting metal is large in size, and the field area is increased.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the metal wire is used as a raw material, the occupied space of equipment is small, and the utilization rate of a workshop is high.
The technical scheme adopted by the invention for solving the problems in the prior art is as follows:
metal powder shaping and aftertreatment system is including preheating device, smelting furnace, air jet system, powder process bucket and collecting vessel.
The heating device comprises at least one feed channel wound with a first heating device.
The smelting furnace include the open furnace body of arranging in upper end, preheating device covers and establishes at furnace body upper end opening part, feedstock channel and furnace body through connection, the furnace body outside is equipped with second heating device, furnace body below through connection has the liquid outlet.
The air injection device comprises a first annular air cavity, an inclined air passage is connected below the first annular air cavity in a penetrating manner, the lower end of the inclined air passage is arranged in an open manner, and a main air pipe is arranged outside the first annular air cavity and is connected with the first annular air cavity in a penetrating manner.
The first annular air cavity is sleeved outside the liquid outlet, and the outlet of the inclined air passage is flush with the outlet of the liquid outlet.
The powder process bucket upper end be equipped with the through-hole, slope air flue export and liquid outlet export are all inserted and are established to the through-hole below.
The collecting barrel is connected below the powder making barrel in a penetrating mode, the outer diameter of the collecting barrel is larger than that of the powder making barrel, the top surface, located on the outer side of the powder making barrel, of the collecting barrel is connected with the exhaust pipe in a penetrating mode, and a filter screen is arranged at the penetrating connection position of the exhaust pipe and the collecting barrel.
A funnel bin is arranged below the inner part of the collecting bucket, a butterfly valve is arranged at the opening part of the bottom of the funnel bin, and a plurality of supports are fixed on the circular shaft surface of the collecting bucket.
Preferably, the heating device comprises a cover cap, at least one heating pipe is convexly arranged on the circumferential surface of the cover cap, a feeding channel is arranged in the middle of the heating pipe, and a first heating device is sleeved outside the feeding channel.
The cover cap is arranged at the opening at the upper end of the furnace body.
Preferably, the lower part of the furnace body is coaxially connected with a continuous heating channel in a through manner, and the liquid outlet is arranged at the lower tail end of the continuous heating channel.
The interior of the furnace body is funnel-shaped with a large upper end and a small lower end.
The furnace body and the continuous heating channel are sleeved with second heating devices.
Preferably, the circumferential surface of the outer side of the first annular air cavity is convexly provided with an annular butt strap, and the bottom surface of the butt strap is abutted against the top surface of the milling barrel.
An annular high-pressure air pipe is sleeved outside the first annular air cavity and is in through connection with the first annular air cavity through a plurality of branch air pipes, and a main air pipe is in through connection with the annular high-pressure air pipe.
Preferably, the preheating device, the smelting furnace, the air injection device and the second heating device are sleeved with a heat preservation sleeve.
The second heating device is arranged between the heat-insulating sleeve and the smelting furnace.
Preferably, the middle part of the milling barrel is provided with a plurality of layers of second annular air cavities, and the second annular air cavities are communicated with the inside of the milling barrel through a plurality of air injection holes.
The powder process bucket outside is equipped with a plurality of U type pipe, and each U type pipe both ends all link up with the radial both ends of one deck second annular air cavity and are connected.
All the U-shaped pipes are communicated with the same air inlet main pipe.
Preferably, the top surface of the collecting barrel is convexly provided with an annular gas collecting cavity, the gas collecting cavity is sleeved outside the powder making barrel, and the exhaust pipe is communicated with the gas collecting cavity.
The gas collecting cavity is communicated with the interior of the collecting barrel, a clamping groove is arranged at the communicated joint of the gas collecting cavity and the collecting barrel, and a filter screen is clamped in the clamping groove.
The inside top of collecting bucket is equipped with annular guide plate, and guide plate upper end opening diameter is the same with powder process bucket internal diameter, and guide plate lower extreme opening diameter is less than powder process bucket internal diameter, and the guide plate top surface is with powder process barrel bottom surface butt
The through connection part of the gas collection cavity and the material collection barrel is positioned outside the guide plate.
Preferably, the preheating device is externally provided with a traction device and a resistor in sequence along the axial direction of the feeding channel.
The traction device comprises a first waist-shaped shell, two first rotating discs are arranged in the first waist-shaped shell in parallel, and arc-shaped first grooves are concavely arranged on the circular shaft surfaces of the first rotating discs.
The gear is coaxially and fixedly connected below the first rotating disc, and the two gears are meshed and connected.
One gear is coaxially and fixedly connected with an output shaft of the first motor.
The resistor comprises a second waist-shaped shell, two second rotating discs are arranged in the second waist-shaped shell in parallel, and arc-shaped second grooves are concavely formed in the circular shaft surfaces of the second rotating discs.
A water cavity is arranged below the second waist-shaped shell, an impeller is fixedly connected with the lower portion of the second rotary disc in a coaxial mode and arranged inside the water cavity, and liquid is filled inside the water cavity.
Draw gear and resistance ware all through bottom sprag board and powder process bucket fixed connection.
Preferably, a metal wire surface treatment device is arranged between the traction device and the resistor.
The metal wire surface treatment device comprises a dustproof barrel, wherein the end faces of two sides of the dustproof barrel are respectively provided with a through hole, the two through holes and the dustproof barrel are coaxially arranged, and the diameter of each through hole is larger than or equal to the outer diameter of a metal wire.
Dustproof barrel outside is equipped with rather than through connection's exhaust tube, and the inside coaxial toper ring gear that is equipped with of dustproof barrel, toper ring gear lie in the coaxial snap ring that is equipped with in wire advancing direction's front end, through first connecting rod fixed connection between toper ring gear and the snap ring.
The outside cover of snap ring is equipped with the stop collar, and the snap ring rotates with the stop collar to be connected, stop collar and dustproof bucket inner wall fixed connection.
And at least two rotating shaft sleeve rods are fixed at one end of the clamping ring, which is far away from the conical gear ring.
The inside abrasive brick that is equipped with a plurality of around dustproof bucket axis and is the annular array and distributes that abrasive brick quantity is the same with pivot loop bar quantity, and the abrasive brick sets up in the one side that the pivot loop bar deviates from the snap ring, and the abrasive brick is equipped with the second connecting rod towards the one end of pivot loop bar, and the second connecting rod end is fixed with the counter weight ball, and the weight of counter weight ball is greater than the weight of abrasive brick.
The second connecting rod is hinged to the rotating shaft sleeve rod, a hinge shaft fixedly connected with the second connecting rod is inserted into the rotating shaft sleeve rod, and the distance from the hinge shaft to the grinding block is smaller than the distance from the hinge shaft to the counterweight ball.
The conical gear ring is meshed with a conical gear, and a second chain wheel which is coaxially and fixedly connected with the conical gear is arranged outside the dustproof barrel.
The bottom support plate is fixed with a second motor, the output shaft of the second motor is colored with a first chain wheel, and a synchronous belt is arranged between the first chain wheel and the second chain wheel.
Preferably, two through holes in the axial direction of the dustproof barrel are provided with guide ends, and the guide ends are arranged at the rear ends of the through holes in the advancing direction of the metal wire.
The diameter of the inlet of the guide end is larger than that of the outlet, the diameter of the outlet of the guide end is the same as that of the through hole of the dustproof barrel, and the outlet of the guide end is communicated with the through hole of the dustproof barrel.
Compared with the prior art, the invention has the following beneficial effects:
(1) The metal wires are used as raw materials and are preheated before entering the smelting furnace, so that the volume of the smelting furnace can be reduced, and the space utilization efficiency of a factory is improved.
(2) Before the metal wire is smelted, an oxide layer on the surface of the metal wire is removed in a friction mode, and the purity of metal powder is improved.
Drawings
The invention is further illustrated with reference to the following figures and examples.
Figure 1 is a front view of a metal powder forming and post-processing system of the present invention,
figure 2 is a bottom view of the metal powder forming and aftertreatment system of the present invention,
FIG. 3 is a schematic diagram of a powder assembly of the metal powder forming and post-treatment system of the present invention,
FIG. 4 is a schematic view of the powder forming and post-treatment system of the present invention,
FIG. 5 is a cross-sectional view of a powder forming assembly of the metal powder forming and post-treatment system of the present invention,
figure 6 is an enlarged view of a portion a of figure 5,
figure 7 is an enlarged view of a portion of figure 5 at B,
FIG. 8 is an external view of a wire feed assembly of the metal powder forming and post-processing system of the present invention,
figure 9 is a partial cross-sectional view of a pulling device in a wire feed assembly of a metal powder forming and aftertreatment system of the invention,
figure 10 is a front view of figure 9,
figure 11 is a partial cross-sectional view of a resistor in a wire feed assembly of a metal powder forming and aftertreatment system of the invention,
figure 12 is a front view of figure 11,
FIG. 13 is a partial cross-sectional view of a wire surface treatment device housing in the wire feed assembly of the metal powder forming and aftertreatment system of the present invention.
In the figure: 1-preheating device, 101-cover, 102-heating pipe, 103-feeding channel, 104-first heating device, 2-smelting furnace, 201-furnace body, 202-continuous heating channel, 203-liquid outlet, 3-air injection device, 301-first annular air cavity, 3011-inclined air channel, 302-annular high-pressure air pipe, 303-branch air pipe, 304-main air pipe, 305-butt plate, 4-heat insulation sleeve, 5-second heating device, 6-powder making barrel, 601-second annular air cavity, 6011-air injection hole, 602-U-shaped pipe, 603-air inlet main pipe, 7-material collecting barrel, 701-air collecting cavity, 7011-clamping groove, 702-air outlet pipe, funnel bin, 704-guide plate, 705-butterfly valve, 8-bracket, 9-filter screen, 9-main air pipe, 703-air collecting barrel, 701-air collecting cavity, 7011-clamping groove, 702-air outlet pipe, funnel bin, 704-guide plate, 705-butterfly valve, 8-support, 9-filter screen 10-traction device, 1001-first waist-shaped shell, 1002-first rotating disc, 1003-first groove, 1004-gear, 11-first motor, 12-resistor, 1201-second waist-shaped shell, 1202-second rotating disc, 1203-second groove, 1204-impeller, 1205-water cavity, 13-dustproof barrel, 1301-guide end, 1302-air exhaust pipe, 1303-limit sleeve, 14-second motor, 1401-first chain wheel, 15-synchronous belt, 16-conical gear, 1601-second chain wheel, 17-conical gear ring, 1701-first connecting rod, 18-snap ring, 19-rotating shaft sleeve rod, 20-grinding block, 2001-second connecting rod, 2002-counterweight ball, 21-bottom support plate, 22-wire.
Detailed Description
As some terms are used throughout the description and claims to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. The description and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, that a person skilled in the art will be able to solve the technical problem within a certain error range, substantially to achieve the technical result.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the present invention, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The metal powder forming and post-processing system of the present invention will be described in further detail with reference to the accompanying drawings, but the present invention is not limited thereto.
Metal powder shaping and aftertreatment system is including preheating device 1, smelting furnace 2, air jet system 3, powder process bucket 6 and collecting bucket 7.
The heating device 1 comprises at least one feeding channel 103 wound with a first heating device 104, in this embodiment, the heating device 1 comprises a cover 101, at least one heating pipe 102 is convexly arranged on the circumferential surface of the cover 101, the feeding channel 103 is arranged in the middle of the heating pipe 102, the first heating device 104 is sleeved outside the feeding channel 103, and the cover 101 is covered on an open upper end of the furnace body 201.
In this embodiment, the number of the heating pipes 102 is greater than or equal to two, so that multi-channel feeding can be performed, and the productivity is improved. Meanwhile, the first heating device 104 employs a heating wire or an electromagnetic induction coil, and when the electromagnetic induction coil is employed, the heating manner of the metal wire 22 inside the feeding passage 103 is high-frequency induction heating.
The smelting furnace 2 comprises a furnace body 201 with an open upper end, a cover 101 of the preheating device 1 covers the open upper end of the furnace body 201, and the cover 101 is fixedly connected with the furnace body 201 through bolts. The feed passage 103 is connected to the furnace body 201.
A continuous heating channel 202 is coaxially connected to the lower part of the furnace body 201 in a through manner, and a liquid outlet 203 is arranged at the lower end of the continuous heating channel 202. The furnace body 201 is internally funnel-shaped with a large upper end and a small lower end, the inner diameter of the small end is the same as the outer diameter of the continuous heating channel 202, and the small end of the furnace body 201 is communicated with the continuous heating channel 202.
The outside of furnace body 201 and continuous heating channel 202 all is equipped with second heating device 5 by the cover, and second heating device 5 adopts the heating plate, or adopts electromagnetic induction coil, heats furnace body 201 and continuous heating channel 202 through the mode of high frequency induction.
The first heating device 104 raises the temperature of the wire 22 to soften the wire 22, and then the wire 22 moves down along the inclined surface of the furnace body 201, and is heated by the second heating device 5 to melt the wire 22, flows into the continuous heating channel 202, and is continuously heated in the continuous heating channel 202 to keep a liquid state. The first heating device 104 and the second heating device 5 are used for heating in a sectional mode, so that energy can be effectively saved, and energy consumption is reduced.
The air injection device 3 comprises a first annular air cavity 301, an inclined air passage 3011 is connected below the first annular air cavity 301 in a penetrating mode, the lower end of the inclined air passage 3011 is arranged in an open mode, and the diameter of the lower end of the inclined air passage 3011 is smaller than that of the upper end of the inclined air passage 3011.
An annular high-pressure air pipe 302 is sleeved outside the first annular air cavity 301, the annular high-pressure air pipe 302 is communicated with the first annular air cavity 301 through a plurality of branch air pipes 303, and a main air pipe 304 is communicated with the annular high-pressure air pipe 302. The plurality of branch air pipes 303 are distributed in an annular array along the axis of the first annular air cavity 301, so that the uniform air flow of each area of the first annular air cavity 301 can be ensured, and further, the uniform air flow blown into the inclined air passage 3011 can be ensured.
The first annular air cavity 301 is sleeved outside the liquid outlet 203, and the outlet of the inclined air passage 3011 is flush with the outlet of the liquid outlet 203. The molten metal solution flows downwards from the liquid outlet 203, high-pressure air flow is blown out from the inclined air channel 3011, the high-pressure air flow is contacted with the metal solution, the metal solution is formed into metal particles through air flow shearing and extrusion, and metal powder is formed after cooling. In order to improve the shearing force, the inclined angle of the inner side surface of the cavity of the inclined air channel 3011 is greater than that of the outer side surface.
The upper end of the powder making barrel 6 is provided with a through hole, the outlet of the inclined air passage 3011 and the outlet of the liquid outlet 203 are inserted below the through hole, and the circumferential surface of the outer side of the first annular air cavity 301 is convexly provided with an annular butt strap 305. The bottom surface of the butt plate 305 is abutted against the top surface of the milling barrel 6, and the butt plate 306 is fixedly connected with the milling barrel 6 through bolts. The preheating device 1, the smelting furnace 2, the air injection device 3 and the second heating device 5 which are positioned outside the powder making barrel 6 are sleeved with a heat preservation sleeve 4, and the second heating device 5 is arranged between the heat preservation sleeve 4 and the smelting furnace 2.
The middle part of the powder making barrel 6 is provided with a plurality of layers of second annular air cavities 601, the second annular air cavities 601 are communicated with the inside of the powder making barrel 6 through a plurality of air injection holes 6011, in the embodiment, the outside of the powder making barrel 6 is sleeved with at least three layers of second annular air cavities 601, and the distance between two adjacent layers is the same.
The powder making barrel 6 is externally provided with a plurality of U-shaped pipes 602, and two ends of each U-shaped pipe 602 are communicated with two radial ends of the second annular air cavity 601 on the same layer. Air supply is carried out through the U-shaped pipe 602, and the U-shaped pipe 602 is communicated with two radial ends of the second annular air cavity 601, so that the air flow in the annular air cavity 601 is ensured. The U-shaped tube 602 at the uppermost layer is located at a height below the middle position of the powder making barrel 6, so that the metal solution particles can be cooled after the action of the high-pressure air sprayed from the inclined air channel 3011 on the metal solution is completed.
All the U-shaped pipes 602 are communicated with the same air inlet manifold 603.
The collecting barrel 7 is connected below the powder making barrel 6 in a penetrating mode, the outer diameter of the collecting barrel 7 is larger than that of the powder making barrel 6, the top surface, located on the outer side of the powder making barrel 6, of the collecting barrel 7 is connected with an exhaust pipe 702 in a penetrating mode, and a filter screen 9 is arranged at the penetrating connection position of the exhaust pipe 702 and the collecting barrel 7.
In this embodiment, the top surface of the collecting barrel 7 is convexly provided with an annular gas collecting cavity 701, the gas collecting cavity 701 is sleeved outside the powder making barrel 6, and the exhaust pipe 702 is in through connection with the gas collecting cavity 701. The gas collection cavity 701 is communicated with the interior of the collecting barrel 7, a clamping groove 7011 is arranged at the communicated joint of the gas collection cavity 701 and the collecting barrel 7, and a filter screen 9 is clamped inside the clamping groove 7011.
A funnel bin 703 is arranged below the inner part of the material collecting barrel 7, the upper end of the funnel bin 703 is large, the lower end of the funnel bin 703 is small, a butterfly valve 705 is arranged at an opening at the bottom of the funnel bin 703, and a plurality of supports 8 are fixed on the circular shaft surface of the material collecting barrel 7.
An annular guide plate 704 is arranged above the inner part of the collecting barrel 7, the opening diameter of the upper end of the guide plate 704 is the same as the inner diameter of the powder making barrel 6, the opening diameter of the lower end of the guide plate 704 is smaller than the inner diameter of the powder making barrel 6, and the top surface of the guide plate 704 is abutted to the bottom surface of the powder making barrel 6. The through connection between the gas collection cavity 701 and the material collection barrel 7 is located outside the flow guide plate 704.
The air flow drives the cooled and solidified metal particles to move downwards, then the cooled and solidified metal particles are guided by the guide plate 704, the air flow is blown to the inner wall of the funnel bin 703, then the air flow is guided by the inner wall of the funnel bin 703 to be inclined upwards, the air flow is blown to the inner part of the area between the guide plate 704 and the material collecting barrel 7, the air flow is filtered by the filter screen 9, and the air is discharged from the exhaust pipe 702. The split flow through the baffle 704 and the guidance of the hopper 703 can avoid the opposite impact of the air flow.
In use, the wire 22 enters from the feeding channel 103 and is heated by the first heating device 104 and the second heating device 5 to form a solution, and the solution is discharged from the liquid outlet 203. The main gas pipe 304 is connected to a high-pressure gas pipe storing nitrogen or other inert gases through a valve, and high-pressure nitrogen is introduced into the main gas pipe 304 in this embodiment. The valve is opened, the high-pressure nitrogen flows into the air injection device 3, and the high-pressure nitrogen is sprayed out through the inclined air channel 3011 to cut and extrude the metal solution, so that the metal solution is atomized to form small particles.
The atomized metal solution and the nitrogen gas move towards the lower part of the powder making barrel 6 together, the gas inlet main pipe 603 is connected with a nitrogen gas pipeline cooled, the nitrogen gas at the bottom of the temperature cross is sprayed into the powder making barrel 6 through the gas spraying hole 6011 to contact with the atomized metal solution, the temperature is reduced, and the atomized metal solution is solidified to form metal powder. The metal powder particles thus formed have high roundness and are lustrous.
The two streams of nitrogen gas are mixed and then discharged through the exhaust pipe 702 and again introduced into the nitrogen gas supply system pipe, so that the nitrogen gas can be reused.
The nitrogen gas supply pipeline comprises a storage tank, the storage tank is connected with a gas outlet pipeline in a through mode, the gas outlet pipeline is connected with a high-pressure pipeline and a low-temperature pipeline in a through mode through a tee joint, and electric control valves are arranged on the high-pressure pipeline and the low-temperature pipeline. The high-pressure pipeline is connected in series with a booster pump and a middle tank, the middle tank is communicated with the main air pipe 304 through a pipeline, and an electric control valve is arranged between the middle tank and the main air pipe. The low-temperature pipeline is communicated with the air inlet header pipe 603, an air pump and a heat exchanger are connected in series between the low-temperature pipeline and the air inlet header pipe, and the heat exchanger cools the nitrogen.
The exhaust pipe 702 is connected with the storage tank in a through manner, a buffer tank is arranged between the exhaust pipe 702 and the storage tank, and an oxygen concentration sensor is arranged on a pipeline between the exhaust pipe 702 and the buffer tank. Be connected with the deaerator through the bypass line between buffer tank and the holding vessel, the deaerator adopts prior art, and bypass line both ends all are equipped with the electro-pneumatic valve.
The preheating device 1 is provided with a traction device 10 and a resistor 12 in sequence along the axial direction of the feed channel 103.
The traction device 10 comprises a first kidney-shaped shell 1001, two first rotating discs 1002 are arranged in the first kidney-shaped shell 1001 in parallel, and arc-shaped first grooves 1003 are concavely arranged on the circular shaft surfaces of the first rotating discs 1002.
A gear 1004 is coaxially and fixedly connected below the first rotating disc 1002, and the two gears 1004 are meshed and connected.
One of the gears 1004 is coaxially and fixedly connected with the output shaft of the first motor 11.
The resistor 12 comprises a second kidney-shaped shell 1201, two second rotating discs 1202 are arranged in parallel in the second kidney-shaped shell 1201, and arc-shaped second grooves 1203 are concavely arranged on the circular shaft surfaces of the second rotating discs 1202.
A water cavity 1205 is arranged below the second kidney-shaped shell 1201, an impeller 1204 is coaxially and fixedly connected below the second rotating disc 1202, the impeller 1204 is arranged inside the water cavity 1205, and liquid is filled inside the water cavity 1205.
The traction device 10 and the resistor 12 are fixedly connected with the milling barrel 6 through a bottom support plate 21.
In this embodiment, the first groove 1003 and the second groove 1203 are both semicircular, and the radius is smaller than or equal to the radius of the metal wire 22. The two first rotating discs 1002 are opposite in rotating direction, the metal wire 22 is clamped in a circular cavity formed by the first grooves 1003 of the two first rotating discs, and the rotating first rotating discs 1002 drive the metal wire 22 to move towards the direction of the feeding channel 103.
The moving wire 22 rotates the two second rotating discs 1202, and the second rotating discs 1202 rotate to rotate the impeller 1204. The impeller 1204 rotates and receives resistance from the fluid inside the water chamber 1205, which increases the resistance to the rotation of the second rotating disk 1202, causing the wire 22 between the traction device 10 and the resistor 12 to tighten and straighten.
Because the surface of the metal wire is easy to form oxides, the metal wire can be used for making aluminum alloy or magnesium alloy wires or pure aluminum wires and pure magnesium wires. These oxides can affect the composition of the solution after the wire 22 melts.
Therefore, in order to obtain the required purity of the formed metal powder, the surface of the wire 22 needs to be treated to remove the oxide on the surface before melting.
In this embodiment, a wire surface treatment device is provided between the traction device 10 and the resistor 12.
The metal wire surface treatment device comprises a dustproof barrel 13, wherein the end faces of two sides of the dustproof barrel 13 are respectively provided with a through hole, the two through holes and the dustproof barrel 13 are coaxially arranged, and the diameter of each through hole is larger than or equal to the outer diameter of a metal wire 22.
An air suction pipe 1302 communicated with the dust-proof barrel 13 is arranged outside the dust-proof barrel 13, a conical toothed ring 17 is coaxially arranged inside the dust-proof barrel 13, a clamping ring 18 is coaxially arranged at the front end of the conical toothed ring 17 in the advancing direction of the metal wire 22, and the conical toothed ring 17 is fixedly connected with the clamping ring 18 through a first connecting rod 1701.
The outside cover of snap ring 18 is equipped with stop collar 1303, and snap ring 18 rotates with stop collar 1303 and is connected, stop collar 1303 and 13 inner wall fixed connection of dustproof bucket.
At least two rotating shaft sleeve rods 19 are fixed at one end of the clamping ring 18, which is far away from the conical gear ring 17.
The inside abrasive brick 20 that is equipped with a plurality of and is the annular array around dust-proof bucket 13 axis and distributes that dust-proof bucket 13 is inside, and abrasive brick 20 quantity is the same with pivot loop bar 19 quantity, and abrasive brick 20 sets up in the one side that pivot loop bar 19 deviates from snap ring 18, and abrasive brick 20 is equipped with second connecting rod 2001 towards the one end of pivot loop bar 19, and the end of second connecting rod 2001 is fixed with counter weight ball 2002, and counter weight ball 2002's weight is greater than abrasive brick 20's weight.
The second connecting rod 2001 is hinged to the rotating shaft sleeve rod 19, a hinge shaft fixedly connected with the second connecting rod 2001 is inserted into the rotating shaft sleeve rod 19, and the distance from the hinge shaft to the grinding block 20 is smaller than the distance from the hinge shaft to the counterweight ball 2002.
The conical gear ring 17 is engaged with a conical gear 16, and a second chain wheel 1601 which is coaxially and fixedly connected with the conical gear 16 is arranged outside the dustproof barrel 13.
The bottom support plate 21 is fixed with a second motor 14, the output shaft of the second motor 14 is also provided with a first chain wheel 1401, and a synchronous belt 15 is arranged between the first chain wheel 1401 and the second chain wheel 1601.
Two through holes in the axial direction of the dustproof barrel 13 are provided with guide end heads 1301, and the guide end heads 1301 are arranged at the rear ends of the through holes in the advancing direction of the metal wire 22.
The diameter of the inlet of the guide end 1301 is larger than the diameter of the outlet, the diameter of the outlet of the guide end 1301 is the same as the diameter of the through hole of the dustproof barrel 13, and the outlet of the guide end 1301 is communicated with the through hole of the dustproof barrel 13.
The guide tip 1301 allows the wire 22 to enter and exit the dust bucket 13 more easily, and the dust bucket 13 is made of a transparent material in order to observe the position of the wire 22 inside the dust bucket 13. The suction tank 1302 is externally connected with a dust collector, and sucks metal dust generated by friction in the dustproof barrel 13, and collects the metal dust in a centralized manner.
The conical ring gear 17 rotates, which in turn rotates the grinding blocks 20 and the weight balls 2002 about the axis of the wire 22, creating a centrifugal force. Because the weight of the weight ball 2002 is greater than the weight of the grinding block 20, the weight ball 2002 flies away from the wire 22. Under the action of the lever, the grinding block 20 is pressed against the wire 22, and the grinding block 20 also rotates around the wire 22 and advances the wire 22, so that the grinding block 20 can grind the surface of the wire 22. The higher the rotating speed of the conical gear ring 17 is, the higher the extrusion force of the grinding block 20 on the metal wire 22 is, and the better the grinding effect on the oxide layer of the metal wire 22 is.
The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (10)
1. Metal powder shaping and aftertreatment system, its characterized in that:
comprises a preheating device (1), a smelting furnace (2), an air injection device (3), a pulverizing barrel (6) and a collecting barrel (7),
the heating device (1) comprises at least one feed channel (103) wound with a first heating device (104),
the smelting furnace (2) comprises a furnace body (201) with an open upper end, a preheating device (1) is covered at the open upper end of the furnace body (201), a feeding channel (103) is communicated with the furnace body (201), a second heating device (5) is arranged outside the furnace body (201), a liquid outlet (203) is communicated below the furnace body (201),
the air injection device (3) comprises a first annular air cavity (301), an inclined air passage (3011) is connected below the first annular air cavity (301) in a penetrating way, the lower end of the inclined air passage (3011) is arranged in an open way, a main air pipe (304) connected with the first annular air cavity (301) in a penetrating way is arranged outside the first annular air cavity (301),
the first annular air cavity (301) is sleeved outside the liquid outlet (203), the outlet of the inclined air passage (3011) is flush with the outlet of the liquid outlet (203),
the upper end of the milling barrel (6) is provided with a through hole, the outlet of the inclined air passage (3011) and the outlet of the liquid outlet (203) are inserted below the through hole,
the collecting barrel (7) is communicated with the lower part of the powder making barrel (6), the outer diameter of the collecting barrel (7) is larger than that of the powder making barrel (6), the top surface of the collecting barrel (7) positioned at the outer side of the powder making barrel (6) is communicated with an exhaust pipe (702), a filter screen (9) is arranged at the communicated joint of the exhaust pipe (702) and the collecting barrel (7),
a funnel bin (703) is arranged below the inner part of the collecting bucket (7), a butterfly valve (705) is arranged at the opening at the bottom of the funnel bin (703), and a plurality of brackets (8) are fixed on the circular shaft surface of the collecting bucket (7).
2. The metal powder forming and post-processing system of claim 1, wherein:
the heating device (1) comprises a cover cap (101), at least one heating pipe (102) is convexly arranged on the circumferential surface of the cover cap (101), a feeding channel (103) is arranged in the middle of the heating pipe (102), a first heating device (104) is sleeved outside the feeding channel (103),
the cover (101) is covered on the opening at the upper end of the furnace body (201).
3. The metal powder forming and post-processing system of claim 2, wherein:
a continuous heating channel (202) is coaxially connected to the lower part of the furnace body (201) in a through way, a liquid outlet (203) is arranged at the tail end of the lower part of the continuous heating channel (202),
the inner part of the furnace body (201) is funnel-shaped with a big upper end and a small lower end,
the furnace body (201) and the continuous heating channel (202) are sleeved with a second heating device (5).
4. The metal powder forming and post-processing system according to claim 1, 2 or 3, wherein:
an annular butt strap (305) is convexly arranged on the circumferential surface of the outer side of the first annular air cavity (301), the bottom surface of the butt strap (305) is abutted against the top surface of the powder making barrel (6),
the outer portion of the first annular air cavity (301) is sleeved with an annular high-pressure air pipe (302), the annular high-pressure air pipe (302) is communicated with the first annular air cavity (301) through a plurality of branch air pipes (303), and the main air pipe (304) is communicated with the annular high-pressure air pipe (302).
5. The metal powder forming and post-processing system of claim 4, wherein:
the preheating device (1), the smelting furnace (2), the air injection device (3) and the second heating device (5) are sleeved with a heat preservation sleeve (4) together,
the second heating device (5) is arranged between the heat-insulating sleeve (4) and the smelting furnace (2).
6. The metal powder forming and post-processing system of claim 5, wherein:
a plurality of layers of second annular air chambers (601) are arranged in the middle part of the powder making barrel (6), the second annular air chambers (601) are communicated with the inside of the powder making barrel (6) through a plurality of air injection holes (6011),
a plurality of U-shaped pipes (602) are arranged outside the powder making barrel (6), two ends of each U-shaped pipe (602) are communicated with two radial ends of the second annular air cavity (601) on the same layer,
all the U-shaped pipes (602) are communicated with the same air inlet manifold (603).
7. The metal powder forming and post-processing system of claim 6, wherein:
the top surface of the collecting barrel (7) is convexly provided with an annular gas collecting cavity (701), the gas collecting cavity (701) is sleeved outside the powder preparing barrel (6), the exhaust pipe (702) is communicated with the gas collecting cavity (701),
the gas collection cavity (701) is communicated with the interior of the material collecting barrel (7), a clamping groove (7011) is arranged at the communicated joint of the gas collection cavity (701) and the material collecting barrel (7), a filter screen (9) is clamped in the clamping groove (7011),
an annular guide plate (704) is arranged above the inner part of the collecting barrel (7), the opening diameter of the upper end of the guide plate (704) is the same as the inner diameter of the powder making barrel (6), the opening diameter of the lower end of the guide plate (704) is smaller than the inner diameter of the powder making barrel (6), the top surface of the guide plate (704) is abutted against the bottom surface of the powder making barrel (6),
the through connection part of the gas collection cavity (701) and the material collection barrel (7) is positioned outside the guide plate (704).
8. The metal powder forming and post-processing system of claim 7, wherein:
a traction device (10) and a resistor (12) are sequentially arranged outside the preheating device (1) along the axial direction of the feeding channel (103),
the traction device (10) comprises a first waist-shaped shell (1001), two first rotating discs (1002) are arranged in the first waist-shaped shell (1001) in parallel, an arc-shaped first groove (1003) is concavely arranged on the circular shaft surface of each first rotating disc (1002),
a gear (1004) is coaxially and fixedly connected below the first rotating disc (1002), the two gears (1004) are meshed and connected,
one gear (1004) is coaxially and fixedly connected with the output shaft of the first motor (11),
the resistor (12) comprises a second waist-shaped shell (1201), two second rotating discs (1202) are arranged in parallel in the second waist-shaped shell (1201), an arc-shaped second groove (1203) is concavely arranged on the circular shaft surface of each second rotating disc (1202),
a water cavity (1205) is arranged below the second waist-shaped shell (1201), an impeller (1204) is coaxially and fixedly connected below the second rotary disc (1202), the impeller (1204) is arranged inside the water cavity (1205), liquid is filled inside the water cavity (1205),
the traction device (10) and the resistor (12) are fixedly connected with the milling barrel (6) through a bottom supporting plate (21).
9. The metal powder forming and post-processing system of claim 8, wherein:
a metal wire surface treatment device is arranged between the traction device (10) and the resistance device (12),
the metal wire surface treatment device comprises a dustproof barrel (13), wherein the end surfaces of two sides of the dustproof barrel (13) are respectively provided with a through hole, the two through holes are coaxially arranged with the dustproof barrel (13), the diameter of each through hole is more than or equal to the outer diameter of a metal wire (22),
an air exhaust pipe (1302) communicated with the dust-proof barrel (13) is arranged outside the dust-proof barrel (13), a conical toothed ring (17) is coaxially arranged inside the dust-proof barrel (13), a clamping ring (18) is coaxially arranged at the front end, located in the advancing direction of the metal wire (22), of the conical toothed ring (17), the conical toothed ring (17) is fixedly connected with the clamping ring (18) through a first connecting rod (1701),
a limiting sleeve (1303) is sleeved outside the snap ring (18), the snap ring (18) is rotationally connected with the limiting sleeve (1303), the limiting sleeve (1303) is fixedly connected with the inner wall of the dustproof barrel (13),
at least two rotating shaft sleeve rods (19) are fixed at one end of the snap ring (18) departing from the conical gear ring (17),
a plurality of grinding blocks (20) distributed in an annular array manner around the axis of the dustproof barrel (13) are arranged in the dustproof barrel (13), the number of the grinding blocks (20) is the same as that of the rotating shaft sleeve rod (19), the grinding blocks (20) are arranged on one side, away from the clamping ring (18), of the rotating shaft sleeve rod (19), a second connecting rod (2001) is arranged at one end, facing the rotating shaft sleeve rod (19), of each grinding block (20), a counterweight ball (2002) is fixed at the tail end of each second connecting rod (2001), and the weight of each counterweight ball (2002) is larger than that of each grinding block (20),
the second connecting rod (2001) is hinged with the rotating shaft sleeve rod (19), a hinged shaft fixedly connected with the second connecting rod (2001) is inserted into the rotating shaft sleeve rod (19), the distance from the hinged shaft to the grinding block (20) is less than the distance from the hinged shaft to the counterweight ball (2002),
the conical gear ring (17) is engaged and connected with a conical gear (16), a second chain wheel (1601) which is coaxially and fixedly connected with the conical gear (16) is arranged outside the dustproof barrel (13),
a second motor (14) is fixed on the bottom supporting plate (21), a first chain wheel (1401) is further arranged on an output shaft of the second motor (14), and a synchronous belt (15) is arranged between the first chain wheel (1401) and the second chain wheel (1601).
10. The metal powder forming and post-processing system of claim 9, wherein:
two through holes in the axial direction of the dustproof barrel (13) are respectively provided with a guide end head (1301), the guide end heads (1301) are arranged at the rear ends of the through holes in the advancing direction of the metal wire (22),
the diameter of the inlet of the guide end head (1301) is larger than that of the outlet, the diameter of the outlet of the guide end head (1301) is the same as that of the through hole of the dustproof barrel (13), and the outlet of the guide end head (1301) is communicated with the through hole of the dustproof barrel (13).
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| CN115502407B (en) | 2023-03-10 |
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